What do directional selection and disruptive selection have in common?
A. They both only affect polygenic traits.
B. They both cause mutations.
C. They both decrease genetic variation.
D. They both happen only in small populations,

The table below shows data for a population of fish in a pond. fish body color # of fins scales? tail shape a silver 4 yes fan b pink 4 yes flat c black 4 yes fan d orange 4 yes flat e orange 4 yes fan f silver 4 yes flat which of the above characteristics would be most in developing a classification system for the fish? a. body color and tail shape b. presence of scales and tail shape c. body color and number of fins d. number of fins and presence of scales